Ski boot

ABSTRACT

This invention relates to a ski boot which is flexible in the area adjacent the instep of a wearer of the boot. The boot is made up in three sections; a back section, a bottom section, and a tongue section. To make the boot flexible, the mating edges of the tongue and back sections comprise portions which are U-shaped in cross section, and the legs of the U-shaped portions are interjoined. The top leg of the tongue section will comprise a part of the top surface of the boot. To interconnect the interjoined legs, a slidable fastener passes through openings in the legs of the tongue section and the leg of the bottom section which extends between the legs of the tongue section. The fastener consists of a cylindrical middle section with flanges at both ends. Each flange is seated in a recess of a respective tongue section leg. A spiral spring surrounds the cylinder, and the ends of the spring abut against protrusions on the opening in the leg of the bottom section which extends between the legs of the tongue section. When the foot is pivoted, the U-shaped portions will move relative to one another against the force of the spring to provide the required flexibility. When the foot is unpivoted, the spring will urge the U-shaped portions back into their original positions. The back section of the boot is made to be pivotable relative to the bottom section so that the back section will follow the back of the leg when the front part of the boot flexes. The pivoting action of the back section is provided by a pivot pin in the heel of the boot.

United States Patent [1 1 Caporicci [451 Mar. 4, 1975 SKI BOOT [75] Inventor: Domenico Caporicci, Ville St.

Laurent, Quebec, Canada [73] Assignee: Norstar Ski Corporation Ltd.,

Quebec, Canada Morgan 36/25 AL Primary E.\'aminerPatrick D. Lawson Attorney, Agent, or Firm-Alan Swabey; Robert E. Mitchell [5 7] ABSTRACT This invention relates to a ski boot which is flexible in the area adjacent the instep of a wearer of the boot.

1 The boot is made up in three sections; a back section,

a bottom section, and a tongue section. To make the boot flexible, the mating edges of the tongue and back sections comprise portions which are U-shaped in cross section, and the legs of the U-shaped portions are interjoined. The top leg of the tongue section will comprise a part of the top surface of the boot. To interconnect the interjoined legs, a slidable fastener passes through openings in the legs of the tongue section and the leg of the bottom section which extends between the legs of the tongue section. The fastener consists of a cylindrical middle section with flanges at both ends. Each flange is seated in a recess of a respective tongue section leg. A spiral spring surrounds the cylinder, and the ends of the spring abut against protrusions on the opening in the leg of the bottom 'section which extends between the legs of the tongue section. When the foot is pivoted, the U-shaped portions will move relative to one another against the force of the spring to provide the required flexibility. When the foot is unpivoted, the spring will urge the U-shaped portions back into their original positions. The back section of the boot is made to be pivotable relative to the bottom section so that the back section will follow the back of the leg when the front part of the boot flexes. The pivoting action of the back section is provided by a pivot pin in the heel of the boot.

7 Claims, 8 Drawing lFigures PATENIED W5 SHEET 1 OF 3 PATENIED MAR M975 sum 3 9 3 SKI BOOT BACKGROUND OF THE INVENTION .l. Field of the Invention This invention relates to a novel structure for a ski boot. More specifically, this invention relates to a ski boot which is flexible in the area adjacent the instep of a wearer.

2. Description of the Prior Art Although for most downhill skiing, a rigid inflexible boot was required, with present day approaches to skiing, and especially the approach where skiers mount a short rise for a jump, a boot which is flexible in that area of the boot adjacent the instep of a wearer of the boot, is desirable. To meet this requirement, boots are supplied which have elastic-like openings at the front of the boot. When a skier pivots his foot upward to mount the rise, the front of the boot stretches open so that the required flexiblity is provided.

However, with this type of boot, the back part of the boot will move away from the back of the leg when the skiers foot is pivoted so that a portion of the back of the leg is left unsupported. Further, the boots have to be adjusted as to the amount of flexibility available. If it is adjusted too flexible, then the remainder of the downhill run could be dangerous. If it is adjusted with little flexibility,then mounting the rises could be difficult.

' STATEMENT OF THE INVENTION In order to overcome the above, and other, disadvantages, a boot is provided with a wide range of flexibility in the front part of the boot adjacent to the instep of the wearer thereof, and the back of the boot is so constructed that it will follow the back of the leg when the skier pivots his foot.

In accordance with the invention, a ski boot comprises;

a bottom section;

a tongue section; and

a back section;

said tongue section comprising a portion which is U-. shaped in cross section, at an, edge of said tongue section;

said bottom section comprising a portion which is U- shaped in cross section, at an edge of said bottom section;

said U-shaped portion of said tongue section being interjoined with said U-shaped portion of said bottom section at a joint at the front part of the boot, said U- shaped portions being movable relative to one another at said joint;

whereby said boot is flexible at said joint.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood by an examination of the following description, together with the accompanying drawings, in which:

FIG. 1 is a side view of a boot constructed in accordance with the invention;

FIG. 2 is a side section of the boot to illustrate the various elements thereof;

FIGS. 3, 3a and 4, 40, respectively, illustrate two different embodiments of the slidable insert arrangement of the invention; and

FIGS. 5 and 6 illustrate the pivoting arrangement at the back of the boot.

DETAILED DESCRIPTION OF THE DRAWINGS Referring now to FIG. 1, the boot, indicated generally at 10, comprises a bottom section 12, a tongue section 14 and a back section 16. The boot also includes a filling of foam rubber orlike material 18.

The back section is pivoted, at the bottom end thereof, by a pivot means 20 which will be more fully discussed below. The boot also includes buckle and strap arrangements 22 and 24 as is well known in the art. The buckle and strap arrangement 24, when in the fastened condition, will provide a mechanical connection betweenthe tongue section 14 and the back section 16.

Preferably the straps 25, which may be made of a flexible material such as flexible wire, pass through slots 27 in the front of the tongue section. The provision of slots here will provide added flexibility to the boots.

The tongue section includes a shock absorber or flexing means 26 which will be more fully discussed below. The tongue section further includes a recessed portion 28 adjacent the back section, and the bottom portion also includes a recessed portion 30 adjacent the back section. When in operation, the back section can slide into the recessed portions 28 and 30 to thereby follow the leg and provide full support even when the wearers foot is pivoted. Similarly, the bottom section contains a recessed portion 32 adjacent the bottom edge of the tongue section into which the tongue section can slide I the bottom edge thereof, a U-shaped portion having legs 14a and 14b. Interjoined with the legs 14a and 14b are legs 12a and 12b of a U-shaped portion of the bottom section. A slidable insert and spring arrangement 34interconnects the legs of the U-shaped portions.

At the back of the boot, overlying portion 16a of back section 16 overlaps underlying portion 12c of bottom section 12. As can be seen, with this arrangement, when the back section of the boot moves upwardly, water or snow will not be able to enter into the boot because of this overlapping of the back and bottom portions.

One embodiment of the slidable insert arrangement is more fully shown in FIG. 3 in which FIG. 3a is a section and FIG. 3b is a top view.

Referring now to FIG. 3, the slidable insert 36 comprises a fastener having a base or female part 38 and a top or male part 40. The fastener is arranged so that the top part is held fast in the base. For example, the top part could be a screw like member, and the base part would include mating screw threads. The fastener is preferably generally cylindrical in shape.

The top part 40 has a flange which is seated in recess 42 of leg 14a, and the bottom part has a flange which is seated in recess 44 of leg 14b. The recesses 42 and 44 prevent motion of the fastener relative to the tongue section when the fastener is tightly fastened. The stem part of the fastener passes through the opening 46 of leg 12a a of the bottom section. Thestem is encircled by a spring means 52 as seen in both FIGS. 3a and 3b.

Referring now to FIG. 3b, which illustrates one embodiment of the slidable insert, the opening 46 contains indentations 48 and 50 with spring retaining protrusions 48a and 50a respectively. The ends 52a and 52b abut with the protrusions 48a and 50a respectively so that the spring is retained in position by these protrusions.

FIG. 4 illustrates a second embodiment of the insert. In this embodiment, it is possible to restrain flexing of the boot is one position of the insert. The position of restraint is made adjustable.

In FIG. 4b, the opening 46 comprises a plurality of circular openings 47a to 47d and a plurality of elongated openings 49a to 490. The insert 36 is elongated in cross section and contains a slot 37 in the top surface thereof. When the insert is in the position shown'in solid lines in FIG. 4b, it will not be able to slide in the opening 46 so that the flexing of the bootis restrained. When 36 is turned through 90, it will be able to move in the elongated openings 49 and the boot is flexible. As .can be seen, the position of restraint is adjustable. It will be appreciated that the diameter of the circular openings 47 will have to be greater than the length of 36, and that the width of the elongated openings will have to be greater than the width of 36, while the length of 36 will have to be greater than the width of the elongated openings.

In FIG. 4a, the relative positions of 47 and 49 are Shown.

In operation, the slidable insert works as follows: When the foot of a boot wearer is unpivoted relative to the leg, the insert will not move because it is restrained by the action of the protrusions 48a and 50a on the ends 52a and 52b respectively of the spring member 52. Thus, under these conditions, the boot will remain firm and supply the support needed in a ski boot.

However, when the foot is pivoted relative to the leg, the bottom section will tend to move relative to the tongue section and the force of the foot movement will be transferred to the bottom section of the boot. It will, of course, be appreciated that, in order for the relative movement to occur, for force will have to be great enough to overcome the retaining action of the spring 52. Specifically, the bottom will tend to move in the direction of the arrow A in FIG. 3 relative to the tongue section. The opening 46 will move back so that the fastener will occupy the forward part of the opening 46 as shown in dotted lines in FIG. 4. When the fastener is in this position, the spring, referenced 52' in the forward position, will be under tension. Thus, the fastener will remain in this forward position only so long as the force urging it in the forward position is great enough to overcome the spring tension. As soon as the foot is pivoted back to its normal position, the forward urging force will be removed, and the tension in the spring will force the fastener back to its original position as shown in FIG. 3 and in solid lines in FIG. 4. It can thus be seen that this arrangement permits the boot to be flexible to the degree required at any moment while still providing firm support when it is not flexed.

It will also be appreciated that, if the leg is pivoted relative to the foot, the same flexibility is provided. However, in this case, it is the tongue which moves relative to the bottom section.

. In order to insure that the back section of the boot will provide support for the back of the leg when the front of the boot is flexed, the back section is adapted to pivot about the heel as is shown in FIG. 5. In FIG. 5, the heel 53 comprises a ball and socket like arrangement with arcuate member 54 in socket 56. A pivoting pin 20 pivotingly connects the back section 16 to the bottom section 12 and provides the pivot point. The pin 20, will, of course, go right through the heel as is shown in FIG. 6. With this arrangement, the back section can pivot relative to the heel so that the back section can follow the back of a wearers leg.

It can also be seen that the back section can pivot in the backward direction. The boot will be opened in this way when it is to be put on.

For'a full description of the operation of the boot,

.reference is had once again to FIG. I. When the foot of a wearer is pivoted relative to his leg, as, for example, by lifting the toe in the upward direction, the boot will flex in the area 26, as was explained with reference to FIG. 4. When the boot flexes, the tongue section 14 will move downward, and the front edge of the tongue section will slide into recess 32 of the bottom section.

Because of the connection between tongue section 14 and back section 16, through the buckle and strap arrangement 24, the back section will be drawn forward, and the front edge of the back section will slide into recesses 28 and 30 of the tongue and bottom sections respectively. Thus, the back section will follow the back of the leg and provide support therefore at all times.

When the foot is unpivoted, the front of the boot will unflex as explained with reference to FIG. 4. The back section will not be free to move back into its original position, and it will there be forced due to the back of the leg pushing against it.

Although a preferred embodiment was described, this was for the purpose of illustrating, but not limiting, the invention. Various modifications, which will come readily to the mind of one skilled in the art, are within the scope of the invention as defined in the appended claims. I claim:

I I l. A ski boot comprising;

a bottom section;

a tongue section; and

a back section;

said tongue section comprising a portion which is U- shaped in cross section, at an edge of said tongue section;

said bottom section comprising a portion which is U- shaped in cross section, at an edge of said bottom section;

said U-shaped portion of said tongue section being interjoined with said U-shaped portion of said bottom section at a joint at the front part of the boot, said U-shaped portions being movable relative to one another at said joint;

whereby said boot is flexible at said joint;

wherein the legs of the U-shaped portions are interconnected by a slidable fastener.

2. A ski boot as defined in claim 1 wherein the back section of the boot is pivotable relative to the bottom section thereof.

3. A ski boot as defined in claim 2 wherein a top leg of the U-shaped portion of said tongue section comprises a part of the top surface of the boot;

one leg of the U-shapedportion of said bottom section extending between the legs of the U-shaped portion of the tongue section;

said slidable fastener being mounted to slide on a surface of the other leg of the U-shaped portion of the bottom section.

4. A ski boot as defined in claim 3 wherein said fastener comprises a base member comprising a generally cylindrical upstanding part with a cavity in the interior thereof;

a flange member attached at one end of said upstanding cylindrical part, said flange being seated in a recess in the bottom leg of the U-shaped portion of the tongue section;

said upstanding cylindrical part passing through openings in both legs of the U-shaped portion of the tongue section and an opening in the one leg of the U-shaped portion of the bottom section;

said fastener further comprising a top member having a second flange member seated in a recess in the top leg of the U-shaped portion of the tongue sec tion, and a projection extending from said second flange member and being retainably insertable into said cavity in said upstanding cylindrical part;

whereby the legs of said U-shaped portions are interconnected. 1

5. A ski boot as defined in claim 4 and further comprising a spiral spring member, having two ends, surrounding said upstanding cylindrical part;

said two ends of said spring member abutting protrusions in the opening in said one leg of said U- shaped portion of said bottom section.

6. A ski boot as defined in claim 2 wherein said bottom section comprises a heel at the back end thereof;

said heel having semi-circular socket-like openings at the both sides of the boot;

said back section comprising two mating semicircular portions extending into said openings and being in slidable engagement with said openings;

and a pivoting pin extending through said mating portions and said heel;

whereby said back section is pivotable relative to said said slidable fastener being elongate in cross section,

the length of the fastener being greater than the width of the elongated opening but less than the diameter of the circular opening, the width of the fastener being less than the width of the elongated opening; 7 whereby, when the fastener extends transversely to the elongated opening in the circular opening, it will be restrained from sliding, and, when the fastener'extends parallel to the elongated opening, it

will be permitted to slide. 

1. A ski boot comprising; a bottom section; a tongue section; and a back section; said tongue section comprising a portion which is U-shaped in cross section, at an edge of said tongue section; said bottom section comprising a portion which is U-shaped in cross section, at an edge of said bottom section; said U-shaped portion of said tongue section being interjoined with said U-shaped portion of said bottom section at a joint at the front part of the boot, said U-shaped portions being movable relative to one another at said joint; whereby said boot is flexible at said joint; wherein the legs of the U-shaped portions are inter-connected by a slidable fastener.
 2. A ski boot as defined in claim 1 wherein the back section of the boot is pivotable relative to the bottom section thereof.
 3. A ski boot as defined in claim 2 wherein a top leg of the U-shaped portion of said tongue section comprises a part of the top surface of the boot; one leg of the U-shaped portion of said bottom section extending between the legs of the U-shaped portion of the tongue section; said slidable fastener being mounted to slide on a surface of the other leg of the U-shaped portion of the bottom section.
 4. A ski boot as defined in claim 3 wherein said fastener comprises a base member comprising a generally cylindrical upstanding part with a cavity in the interior thereof; a flange member attached at one end of said upstanding cylindrical part, said flange being seated in a recess in the bottom leg of the U-shaped portion of the tongue section; said upstanding cylindrical part passing through openings in both legs of the U-shaped portion of the tongue section and an opening in the one leg of the U-shaped portion of the bottom section; said fastener further comprising a top member having a second flange member seated in a recess in the top leg of the U-shaped portion Of the tongue section, and a projection extending from said second flange member and being retainably insertable into said cavity in said upstanding cylindrical part; whereby the legs of said U-shaped portions are inter-connected.
 5. A ski boot as defined in claim 4 and further comprising a spiral spring member, having two ends, surrounding said upstanding cylindrical part; said two ends of said spring member abutting protrusions in the opening in said one leg of said U-shaped portion of said bottom section.
 6. A ski boot as defined in claim 2 wherein said bottom section comprises a heel at the back end thereof; said heel having semi-circular socket-like openings at the both sides of the boot; said back section comprising two mating semi-circular portions extending into said openings and being in slidable engagement with said openings; and a pivoting pin extending through said mating portions and said heel; whereby said back section is pivotable relative to said bottom section about the pivoting pin in said heel.
 7. A ski boot as defined in claim 3 wherein said slidable fastener passes through openings in both legs of the U-shaped portion of the tongue section and an opening in the one leg of the U-shaped portion of the bottom section; said openings comprising at least one circular opening and at least one elongated opening extending from said circular opening; said slidable fastener being elongate in cross section, the length of the fastener being greater than the width of the elongated opening but less than the diameter of the circular opening, the width of the fastener being less than the width of the elongated opening; whereby, when the fastener extends transversely to the elongated opening in the circular opening, it will be restrained from sliding, and, when the fastener extends parallel to the elongated opening, it will be permitted to slide. 